Portion of a shoe sole



FIG. 1 is a front perspective view of a portion of a shoe sole showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is an enlarged front perspective view of the portion of the shoe sole shown in isolation from the disclaimed environment;

FIG. 5 is an enlarged rear perspective view of the portion of the shoe sole shown in isolation from the disclaimed environment; and,

FIG. 6 is an enlarged bottom plan view of the portion of the shoe sole shown in isolation from the disclaimed environment.

The uneven broken line immediately adjacent the perimeter of the shaded area represents an unclaimed boundary of the design. The uneven broken line showing of the central circular region and remainder of the shoe is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a shoe sole, as shown and described. 